Lahey Computer Systems  
   Fortran 95/90 and C++ compilers for Linux, Windows Windows.NET, and SPARC Solaris. Also sells Essential Lahey Fortran subset compiler for Windows and graphics and user interface tools and libraries.
   http://www.lahey.com/

Compaq Visual Fortran and HP Fortran  
   Fortran 95 compilers for Windows, Tru64 UNIX Alpha, Linux Alpha, and OpenVMS Alpha, Fortran 77 for OpenVMS VAX.
   http://h18009.www1.hp.com/fortran/

Absoft Pro Fortran  
   Fortran 95/90/77 and C/C++ compilers for Windows, Mac OS 9 and OS X, Linux IA32 and AMD Opteron and AMD Athlon 64-bit processors. Resells IBM XL Fortran compiler for Mac OS X. Offers VAST parallelization and vectorization tools.
   http://www.absoft.com/

Portland Group  
   Fortran 95, C and C++ Compilers for 32-bit and 64-bit AMD64 and IA32 processor-based Linux and Windows systems.
   http://www.pgroup.com/index.htm

NAGWare  
   Fortran 95 compiler with 2003 features for Linux, Windows, and Unix on many platforms.
   http://www.nag.co.uk/nagware.asp

Microsoft Fortran Versions  
   Detailed information, including photos.
   http://www.emsps.com/oldtools/msforv.htm

NASoftware  
   Fortran 95 compiler with 2003 features for Linux and Windows. Sells Fortran libraries and books.
   http://www.nasoftware.co.uk/fortran-plus/index.html

IBM Fortran Compilers  
   Fortran 95 compilers for AIX, Mac OS X, and Linux on IBM iSeries and pSeries platforms. Fortran 77 compiler for IBM mainframes.
   http://www-3.ibm.com/software/awdtools/fortran/

HicEst  
   Incremental compiler and interpreter with interactive Windows graphical user interface designed for immediate results during development of technical or scientific applications. [Shareware, but freeware for shorter scripts]
   http://www.hicest.com/

F  
   Subset Fortran 95 compiler, keeping only the modern features. The compiler is freely available on Windows, Linux, and Solaris.
   http://www.fortran.com/F/index.html

Intel  
   Fortran 95 and C++ compilers for Linux and Windows.
   http://www.intel.com/software/products/compilers/

Fujitsu Development Tools  
   Fortran 95 and C compilers for SPARC Solaris and Linux.
   http://www.fr.fse.fujitsu.com/devuk/

Apogee  
   Fortran 90, C, and C++ for SPARC Solaris.
   http://www.apogee.com/compilers.html

Open Watcom  
   Fortran 77, C, and C++ compilers for Win32, Win16, DOS, and OS/2. Freeware.
   http://www.openwatcom.org/product/features_content.html

RISC-OS Fortran Compilers  
   Links to Fortran 77 compilers on this operating system.
   http://users.argonet.co.uk/users/fortran/comps.htm#rel2

Sun Studio C/C++/Fortran Compilers  
   Resources for software developers using C, C++, or Fortran 95.
   http://developers.sun.com/prodtech/cc/

Prospero  
   Fortran 77 compilers for OS/2 and MS-DOS.
   http://www.prosperosoftware.com/f2iix.html

Green Hills  
   Fortran 77 Compilers conform fully to ANSI X3.9-1978 Standard FORTRAN 77 (Full Language) and FIPS PUB 069-1, and adds the DOD MIL-STD 1753 Fortran extensions and selected VAX/VMS FORTRAN extensions. Supported processors include 68K, MIPS, x86, SPARC, and
   http://www.ghs.com/products/FORTRAN_compilers.html

Win32 Fortran Compiler Comparisons  
   Describes the extensions supported by Fortran compilers, their diagnostic capabilities, third party support, and execution time for Fortran 77 and 90 programs.
   http://www.polyhedron.com/compare.html

Intel Linux Fortran Compiler Comparisons  
   Compares compilers by supported extensions, diagnostic capabilities, and execution time on Fortran 77 and Fortran 90 programs.
   http://www.polyhedron.com/complnx.html

Free Fortran Compilers and Interpreters  
   Links to free compilers and interpreters, mostly Fortran 77.
   http://www.thefreecountry.com/compilers/fortran.shtml

SGI  
   Describes the Fortran 77 and 90 compilers and tools for parallelization.
   http://www.sgi.com/software/irix/tools/fortran.html

NEC  
   Describes 32 and 64-bit Fortran 90 compilers for NEC and IBM PC hardware.
   http://www.sw.nec.co.jp/APSOFT/SX/asl_e/detail.html

Open64  
   Suite of optimizing compiler development tools for Intel Itanium(TM) systems running Linux. The Open64 project is the continuation of the SGI Pro64(TM) compiler suite which was released under the GNU General Public License (GPL). The Open64 compiler sui
   http://open64.sourceforge.net/

Silverfrost  
   Fortran 95 compiler for Win32 and Microsoft .NET. The personal edition is free for non-commercial use.
   http://www.silverfrost.com/11/ftn95/overview.asp

BC Fortran  
   MS-DOS 16-bit Fortran 77 compiler/linker/debugger.
   http://drn.digitalriver.com/product.php[id]45854[SiteID]macesoftware

Fortran 66 compiler  
   For MS-DOS, distributed by Dynacomp Software.
   http://www.dynacompsoftware.com/ebay/ANSI66.htm

PathScale  
   Fortran 95, C, and C++ compilers for Linux on AMD Opteron.
   http://pathscale.com/ekopath.html

Evaluation of Fortran 90 compilers for Intel Linux  
   By Gerry Murray, as of May 2000.
   http://www-sdd.fsl.noaa.gov/~murray/linuxFortran90.html